Selective sulfonation process

Details Selective sulfonation process Selective sulfonation process

C - Chemistry, Metallurgy

07

D

260/329, 260/541

C07D 333/34 (2006.01) C07C 143/72 (1985.01) C07C 143/86 (1985.01)

Patent

CA 1214775

ABSTRACT OF THE DISCLOSURE A 4-acyl-o-phenylenediamine is selectively sulfonated on the amino group meta to the acyl group to provide an important intermediate for benzimidazole pharmaceuticals. Some of the intermediates are new to organic chemistry.

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